This is a note to let you know that I've just added the patch titled
scsi: 53c700: Check that command slot is not NULL
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-53c700-check-that-command-slot-is-not-null.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8366d1f1249a0d0bba41d0bd1298d63e5d34c7f7 Mon Sep 17 00:00:00 2001
From: Alexandra Diupina <adiupina@xxxxxxxxxxxxx>
Date: Fri, 28 Jul 2023 15:35:21 +0300
Subject: scsi: 53c700: Check that command slot is not NULL
From: Alexandra Diupina <adiupina@xxxxxxxxxxxxx>
commit 8366d1f1249a0d0bba41d0bd1298d63e5d34c7f7 upstream.
Add a check for the command slot value to avoid dereferencing a NULL
pointer.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Co-developed-by: Vladimir Telezhnikov <vtelezhnikov@xxxxxxxxxxxxx>
Signed-off-by: Vladimir Telezhnikov <vtelezhnikov@xxxxxxxxxxxxx>
Signed-off-by: Alexandra Diupina <adiupina@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230728123521.18293-1-adiupina@xxxxxxxxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/53c700.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/53c700.c
+++ b/drivers/scsi/53c700.c
@@ -1598,7 +1598,7 @@ NCR_700_intr(int irq, void *dev_id)
printk("scsi%d (%d:%d) PHASE MISMATCH IN SEND MESSAGE %d remain, return %p[%04x], phase %s\n", host->host_no, pun, lun, count, (void *)temp, temp - hostdata->pScript, sbcl_to_string(NCR_700_readb(host, SBCL_REG)));
#endif
resume_offset = hostdata->pScript + Ent_SendMessagePhaseMismatch;
- } else if(dsp >= to32bit(&slot->pSG[0].ins) &&
+ } else if (slot && dsp >= to32bit(&slot->pSG[0].ins) &&
dsp <= to32bit(&slot->pSG[NCR_700_SG_SEGMENTS].ins)) {
int data_transfer = NCR_700_readl(host, DBC_REG) & 0xffffff;
int SGcount = (dsp - to32bit(&slot->pSG[0].ins))/sizeof(struct NCR_700_SG_List);
Patches currently in stable-queue which might be from adiupina@xxxxxxxxxxxxx are
queue-6.4/scsi-53c700-check-that-command-slot-is-not-null.patch
